Why did they fall on their faces?

I’m confused (as I always am lol) about something in this week’s parasha. It says the people “fell on their faces” and I don’t get it? Like they’re impressed with Hashem so they… fall down? And the commentary says it means they praised G-d, but I still don’t know why they had to fall on their faces to do so? Someone that actually understands Torah, can you please explain this? Thank you